* {
    margin: 0;
    padding: 0;
}

.bj {
    background: url(https://gimg2.baidu.com/image_search/src=http%3A%2F%2Ffile.moyublog.com%2Fd%2Ffile%2F2021-01-30%2F626a50eca246f4767d960d29fa05d04b.jpg&refer=http%3A%2F%2Ffile.moyublog.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1655999971&t=9e459080741a474b72a128d4ec0f24de) no-repeat;
    background-size: 100% 100%;

}

form {
    margin: 0 20rem auto;
}

.main {
    width: 25rem;
    margin: 5% 35% 0% 35%;
}

.GN {
    margin: 20px 25% 0% 20%;
}

.GN button {
    margin-left: 20px;
}

.table {
    width: 80rem;
    margin: 5% 10% 0% 10%;
}